The north line of township twenty-three north, along ranges fifteen, sixteen, seventeen, eighteen and nineteen east, as shown by approved United States surveys, shall be the dividing line between Colfax county on the south, Mora county on the north and the range line between ranges nineteen and twenty east, to a point where said range line at present intersects the boundary line between said counties, from which point said boundary line, as now established by said act, January 13, 1876 [4-4-2 N.M. Stat. Ann.], shall continue east to the west line of the state of Texas.